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Archive \ Volume.7 2018 Issue 1

Determination of the Efficiency of Electro-Persulfate Process in Reducing Concentration of Ciprofloxacin from Aquatic Environment by Voltammetric Measurement

Saba Majidi , Alireza Rahmani

Abstract

Introduction: In recent decades, the use of organic matters has been increasing as a micro-pollutant resistant to antibiotics. Antibiotic resistance is one of the effects of these micro-pollutant on humans. The purpose of this research was to determine the efficiency of electro-persulfate process in removing antibiotic ciprofloxacin from aqueous solution by voltammetric measurements.

Method: This is an experimental study that was carried out using a reactor with a volume of one liter, coupled with electrodes of iron as a cathode and anode with an area of 40 cm2. The effect of pH variables, flow intensity, persulfate concentration and concentration of antibiotic ciprofloxacin was studied. Concentration of Antibiotic ciprofloxacin was read by using an HPLC apparatus at wavelength of 275 nm. Voltammetric technique was used to ensure antibiotic degradation.

Results: The results of the experiment showed that the process under optimal conditions of the experiment includes pH equal to 3, 12 mM of persulfate concentration, 12 mA / cm2 of current density, initial concentration of antibiotic by 5 mg / L and reaction time of 10 minutes, removal efficiency of Antibiotics of ciprofloxacin by 98.51%. The electro-fenton and persulfate processes separately, the maximum removal efficiency in optimal conditions was 65.12% and 5.7%, respectively. The diagram resulting from analysis of data by the voltammetric technique has been shown to reduce the flow of desired pollutant.

Conclusion: taking into account the analysis of data, a voltammetric method showed that the electro-persulfate process can be a suitable process in the direction of the desired pollutant.